Improvement in plastering safety-plates



G. A. TH--URS-TUN.v

Plastering Safety-Plate.

Patented Oct. 26, 187 5.

N. PETERS. PHOTO-.LITHOGRAFHE UNITED STATES' PATENT I. OFFICE.

GEORGE A. THURSTON, OF CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN PLASTERING SAFETY-PLATES.

Specification forming part of Letters Patent No. 169,128, dated October 26, 1875; application filed September 21, 1875.

To. all whom it may concern Be it known that I, GEORGE A. THURsToN, of Cambridge, of the county of Middlesex and State of Massachusetts, have invented a new and useful Plastering Safety-Plate or Guard; and do hereby declare the same to be fully described in the following speciiication and represented in the accompanying -draW- ings, of Which'- Figure l is a front elevation,Fig. 2 is an edge view, and Figs. 3 and 4 are vertical sections, of it.

The article is intended to be applied to a chimney-breast, or a partition or Wall, Whose face is to be plastered, such article being to be covered in part by the plastering, and to operate like lathing, to give support thereto. The article is further designed for use with a ventila'tor or a stove-pipe, or a thinlble therefor, to enter the said chimney-breast, Wall, or partition.

The article consists of a slotted plate, A, and a flanged tubular collar, B, arranged as represented in the accompanying drawings, the whole being usually cast in one piece of metal. The plate I generally make square, and with one or more series of holes or slots, a a a, going through it. Each of the said slots may be dovetailed or Atapering in transverse section, if desirable. They are designed to receive the plaster, as do the spaces between the laths nailed to furrings.

In using the article it is to be placed against two furrings, and secured thereto by nails or screws going through holes b b b b b b, made through it near its edges, the thickness of the plate corresponding to that of the laths to be nailed to the said furrings. The front face ot' the plate comes ush with the laths. The plastering, When applied to the latter, is to extend over the plate, and up to'and around the/anged collar, and be flush with its front ledge. The collar is designed to receive the ventilator, stove-pipe, orv thirnble, which generally should have a diameter somewhat less than the bore of the collar, in order that, when the furrings and plastering may shrink, the collar may-move therewith, and Vnot bind on the pipe or thiinble, so as to cause the plastering' to crack.

I claim as my invention- The plastering-guard, substantially as described, consisting of the holed or slotted plate A, and the anged tubular collar B, arranged essentially in manner and for use as specified GEORGE A. THURsToN.

Witnesses R. H. EDDY,

J. R. SNOW. l 

